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New Synthetic Routes to Polysilanes.
Technical rept. Feb-Jul 87,
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY
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Three new synthetic routes for the synthesis of polysilanes have been applied low temperature coupling in the presence of ultrasound, modification of polyalkylarylsilylene with triflic acid, and ring-opening polymerization. Low temperature reductive coupling of dichlorosilanes with sodium in the presence of ultrasound leads to monomodal polymers with low polydispersity in contrast to bimodal polymers prepared by the thermal coupling. Modification of polysilanes with triflic acid gives access to new polysilanes with pendant alkoxy or amino substituents. Ring-opening polymerization have been successful only for the strained cyclic polysilanes with small substituents.
APPROVED FOR PUBLIC RELEASE